:root{
  --blue:#3B5BDB; --blue-l:#5C7CFA; --purple:#7048E8; --mint:#0CA678;
  --orange:#FF922B; --pink:#F06595;
  --ink:#1a1a2e; --ink-soft:#5b5b73; --line:#e7ebf5;
  --bg1:#eef3ff; --bg2:#e6ecff; --bg3:#eafaf3;
  --card:#ffffff; --radius:28px; --shadow:0 18px 50px rgba(59,91,219,.10);
  --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-en:"Montserrat",var(--font-cn);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-cn); color:var(--ink); line-height:1.7;
  background:
    radial-gradient(120% 80% at 0% 0%, var(--bg1) 0%, transparent 55%),
    radial-gradient(120% 80% at 100% 10%, #f0eaff 0%, transparent 50%),
    radial-gradient(120% 90% at 50% 100%, var(--bg3) 0%, transparent 55%),
    #f7f9ff;
  background-attachment:fixed;
}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}

/* ===== 导航 ===== */
.nav{
  position:fixed; top:18px; left:50%; transform:translateX(-50%);
  width:min(1080px,92vw); z-index:50;
  display:flex; align-items:center; gap:14px;
  padding:10px 12px 10px 16px;
  background:rgba(255,255,255,.72); backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.8); border-radius:999px;
  box-shadow:0 10px 30px rgba(59,91,219,.12);
}
.nav-brand{display:flex;align-items:center;gap:10px;font-weight:800}
.nav-avatar{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--purple),var(--blue));color:#fff;font-size:15px;font-weight:800
}
.nav-brand-text{font-family:var(--font-en);letter-spacing:1.5px;font-size:14px;color:var(--ink)}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{
  padding:8px 14px;border-radius:999px;font-size:14px;color:var(--ink-soft);transition:.2s;font-weight:600
}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{background:var(--ink);color:#fff}
.nav-resume{
  padding:9px 16px;border-radius:999px;font-size:13px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--blue),var(--blue-l));white-space:nowrap
}

/* ===== 首页 ===== */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;
  padding:120px 24px 80px;position:relative}
.hero-inner{
  width:min(1080px,100%);margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;
  gap:40px;align-items:center
}
.tag{display:inline-block;padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:700;letter-spacing:.5px}
.tag-hello{background:#eae4ff;color:var(--purple);margin-bottom:18px}
.tag-file{background:#e3fbf1;color:var(--mint);margin:18px 0 14px}
.hero-name{font-size:clamp(38px,5.5vw,64px);line-height:1.1;font-weight:800;letter-spacing:-.5px}
.name-grad{
  background:linear-gradient(120deg,var(--purple),var(--blue) 55%,var(--mint));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  padding:0 4px
}
.hero-role{
  font-size:clamp(26px,3.6vw,40px);font-weight:800;margin:14px 0 4px;
  background:linear-gradient(120deg,var(--purple),var(--blue) 55%,var(--mint));
  -webkit-background-clip:text;background-clip:text;color:transparent
}
.hero-desc{color:var(--ink-soft);font-size:15.5px;max-width:540px}
.hero-chips{display:flex;flex-wrap:wrap;gap:9px;margin:6px 0 22px}
.chip{padding:7px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:13px;font-weight:600;color:var(--ink)}
.hero-btns{display:flex;gap:12px}
.btn{padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s;cursor:pointer;border:none;display:inline-block}
.btn-primary{background:linear-gradient(135deg,var(--purple),var(--blue));color:#fff}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{filter:brightness(1.15)}
.btn-mint{background:linear-gradient(135deg,var(--mint),#3bc9a0);color:#fff}
.btn-mint:hover{filter:brightness(1.05)}
.btn-purple{background:linear-gradient(135deg,var(--purple),var(--blue));color:#fff}
.btn-purple:hover{filter:brightness(1.06);transform:translateY(-2px)}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.12)}

.hero-right{display:flex;justify-content:center}
.hero-photo{position:relative;width:min(380px,80%)}
.hero-photo img{width:100%;filter:drop-shadow(0 20px 40px rgba(59,91,219,.18))}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  font-size:13px;color:var(--ink-soft);font-weight:600;animation:bob 1.8s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,7px)}}

/* ===== 通用 section ===== */
.section{padding:96px 24px;max-width:1080px;margin:0 auto;min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;scroll-margin-top:0}
#projects{justify-content:flex-start;padding-top:78px;padding-bottom:54px}
#projects .sec-head{margin-bottom:24px}
#projects .proj-img{height:230px;min-height:230px}
#projects .proj-viewer{gap:22px}
#projects .proj-info{padding:22px 24px}
#projects .proj-nav{margin-top:16px}
.section-alt{background:linear-gradient(180deg,rgba(232,238,255,.5),rgba(234,250,243,.5));
  max-width:none;border-radius:48px 48px 0 0;margin-top:40px;min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;align-items:center;scroll-margin-top:0}
.section-alt>*{max-width:1080px;width:100%}
.sec-head{text-align:center;margin-bottom:54px}
.sec-en{font-family:var(--font-en);font-weight:700;letter-spacing:2px;font-size:13px;
  background:linear-gradient(90deg,var(--purple),var(--blue));-webkit-background-clip:text;
  background-clip:text;color:transparent}
.sec-title{font-size:clamp(28px,4vw,42px);font-weight:800;margin:10px 0 8px;letter-spacing:-.5px}
.sec-sub{color:var(--ink-soft);font-size:15px;max-width:560px;margin:0 auto}

/* ===== 教育背景 ===== */
.edu-cards{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:stretch}
.edu-card{position:relative;background:var(--card);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column}
.edu-photo{height:180px;overflow:hidden;position:relative}
.edu-photo img{width:100%;height:100%;object-fit:cover;cursor:pointer;transition:transform .5s ease}
.edu-photo img:hover{transform:scale(1.04)}
/* 箭头：常显 + 大点击区，hover 整张图都更易点 */
.edu-arrow{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;border:none;
  background:rgba(255,255,255,.82);color:var(--ink);font-size:26px;font-weight:700;cursor:pointer;
  display:grid;place-items:center;box-shadow:0 6px 18px rgba(0,0,0,.22);transition:.2s;z-index:4;
  opacity:.7}
.edu-photo:hover .edu-arrow{opacity:1}
.edu-arrow:hover{background:var(--blue);color:#fff;transform:translateY(-50%) scale(1.12);opacity:1}
.edu-arrow::after{content:"";position:absolute;inset:-8px;border-radius:50%} /* 扩大 hit-area */
.edu-prev{left:12px}
.edu-next{right:12px}
.edu-dots{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);display:flex;gap:6px;z-index:3}
.dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.55);cursor:pointer;transition:.25s;border:none;padding:0}
.dot:hover{background:rgba(255,255,255,.9)}
.dot.active{background:#fff;width:24px;border-radius:999px}
.edu-body{padding:22px 24px 26px}
.edu-stage{font-size:12.5px;font-weight:700;color:var(--blue)}
.edu-body h3{font-size:22px;font-weight:800;margin:8px 0 4px}
.edu-body h3 em{font-style:normal;font-size:13px;color:var(--orange);font-weight:700}
.edu-major{color:var(--ink);font-weight:600;font-size:14.5px;margin-bottom:8px}
.edu-courses{color:var(--ink-soft);font-size:13.5px}
.edu-link{display:flex;align-items:center;justify-content:center}
.edu-link span{writing-mode:vertical-rl;font-size:13px;font-weight:700;color:var(--ink-soft);
  background:#fff;padding:14px 8px;border-radius:999px;box-shadow:var(--shadow)}
.honor-bar{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px}
.honor-col{background:var(--card);border-radius:var(--radius);padding:24px 28px;box-shadow:var(--shadow)}
.honor-col h4{font-size:16px;font-weight:800;margin-bottom:12px;color:var(--blue)}
.honor-col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.honor-col li{font-size:14px;color:var(--ink-soft);padding-left:20px;position:relative}
.honor-col li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,var(--purple),var(--blue))}

/* ===== 工作经历 / 时间线 ===== */
.timeline{display:flex;flex-direction:column;gap:26px;position:relative;padding-left:8px}
.timeline::before{content:"";position:absolute;left:18px;top:8px;bottom:8px;width:3px;
  background:linear-gradient(180deg,var(--purple),var(--blue),var(--mint));border-radius:3px}
.tl-item{position:relative;padding-left:54px}
.tl-item::before{content:"";position:absolute;left:10px;top:22px;width:20px;height:20px;border-radius:50%;
  background:#fff;border:4px solid var(--blue);box-shadow:0 0 0 5px rgba(92,124,250,.15)}
.tl-card{background:var(--card);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow);position:relative}
.tl-time{font-size:12.5px;font-weight:700;color:var(--blue)}
.tl-card h3{font-size:18px;font-weight:800;margin:6px 0 12px}
.tl-list{list-style:none;display:flex;flex-direction:column;gap:9px}
.tl-list li{font-size:14px;color:var(--ink-soft);padding-left:18px;position:relative}
.tl-list li::before{content:"▹";position:absolute;left:0;color:var(--blue)}
.tl-list b{color:var(--ink)}
.tl-chip{position:absolute;top:22px;right:22px;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}
.tl-chip-green{background:#e3fbf1;color:var(--mint)}
.tl-chip-purple{background:#eae4ff;color:var(--purple)}

/* ===== 作品集 ===== */
.proj-viewer{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
.proj-stage{display:flex;flex-direction:column;gap:14px}
.proj-img{border-radius:var(--radius);height:300px;min-height:300px;background:#eef2ff center/100% 100% no-repeat;
  box-shadow:var(--shadow);transition:.4s;position:relative;overflow:hidden}
.proj-thumbs{display:flex;gap:10px}
.thumb{flex:1;height:10px;border-radius:999px;border:none;background:#d8e0f5;cursor:pointer;transition:.2s;padding:0}
.thumb:hover{background:#c3cef0}
.thumb.active{background:linear-gradient(90deg,var(--purple),var(--blue));height:12px}
/* 切换控件固定在图片区下方，不随右侧文字长短浮动 */
.proj-nav{display:flex;align-items:center;justify-content:center;gap:24px;margin-top:34px}
.proj-arrow{width:52px;height:52px;border-radius:50%;border:1.5px solid var(--line);background:#fff;
  font-size:20px;cursor:pointer;color:var(--ink);transition:.2s;box-shadow:0 6px 16px rgba(59,91,219,.1)}
.proj-arrow:hover{border-color:var(--blue);color:var(--blue);transform:scale(1.08);box-shadow:0 8px 22px rgba(59,91,219,.2)}
.proj-arrow:active{transform:scale(.96)}
#projCount{font-family:var(--font-en);font-weight:700;color:var(--ink-soft);font-size:15px;min-width:74px;text-align:center}
.proj-info{background:var(--card);border-radius:var(--radius);padding:30px 30px;box-shadow:var(--shadow);
  display:flex;flex-direction:column}
.proj-no{font-family:var(--font-en);font-weight:800;font-size:34px;
  background:linear-gradient(120deg,var(--purple),var(--blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.proj-meta{font-size:13px;font-weight:700;color:var(--blue);margin:4px 0 10px}
.proj-info h3{font-size:22px;font-weight:800;margin-bottom:12px;line-height:1.35}
.proj-desc{color:var(--ink-soft);font-size:14.5px;flex:1}
.proj-tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 20px}
.proj-tags span{font-size:12.5px;font-weight:600;padding:6px 12px;border-radius:999px;background:#eef2ff;color:var(--blue)}
#openProj{align-self:flex-start}

/* ===== 技能与爱好（分组 + 层级，抓重点）===== */
.skill-grid{display:flex;flex-direction:column;gap:44px;max-width:1080px;margin:0 auto;width:100%}
.skill-group-head{display:flex;align-items:baseline;gap:14px;margin-bottom:20px;flex-wrap:wrap}
.skill-group-head h3{font-size:21px;font-weight:800;letter-spacing:-.3px}
.skill-group-head h3::before{content:"";display:inline-block;width:6px;height:20px;border-radius:3px;
  background:linear-gradient(135deg,var(--purple),var(--blue));margin-right:10px;vertical-align:-3px}
.skill-group-head span{font-size:13px;color:var(--ink-soft)}
.skill-row{display:grid;gap:18px}
.skill-row.lg{grid-template-columns:repeat(4,1fr)}
.skill-row.sm{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.skill-row.muted{grid-template-columns:repeat(2,minmax(280px,380px));justify-content:center}
.skill-card{background:var(--card);border-radius:22px;padding:24px 26px;box-shadow:var(--shadow);
  border:1px solid #eef1fb;display:flex;flex-direction:column;gap:14px;transition:.25s;position:relative;overflow:hidden}
.skill-card:hover{transform:translateY(-4px);box-shadow:0 22px 50px rgba(59,91,219,.16)}
.skill-card .s-top{display:flex;align-items:center;gap:13px}
.skill-card .s-ic{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:26px;flex:none;
  background:linear-gradient(135deg,var(--purple),var(--blue));color:#fff;box-shadow:0 8px 18px rgba(112,72,232,.28)}
.skill-card h3{font-size:18px;font-weight:800;line-height:1.3}
.skill-card .s-en{font-family:var(--font-en);font-size:11px;letter-spacing:1.5px;color:var(--blue);font-weight:700}
.skill-card p{color:var(--ink-soft);font-size:14px;line-height:1.75}
/* 核心竞争力：更突出 */
.skill-row.lg .skill-card{padding:28px 26px;border:1.5px solid #e3e8fb}
.skill-row.lg .s-ic{width:56px;height:56px;font-size:29px}
.skill-row.lg .skill-card h3{font-size:19px}
/* AI 高亮 */
.skill-card.ai{background:linear-gradient(135deg,#f3efff,#eef4ff);border:1.5px solid #c8b6ff}
.skill-card.ai .s-ic{background:linear-gradient(135deg,var(--orange),var(--pink));box-shadow:0 8px 18px rgba(255,146,43,.3)}
.skill-card.ai::after{content:"AI";position:absolute;top:14px;right:16px;font-family:var(--font-en);font-weight:800;font-size:11px;
  color:#fff;background:linear-gradient(135deg,var(--purple),var(--blue));padding:3px 10px;border-radius:999px}
/* 生活爱好：弱化 */
.skill-card.muted{background:#f4f7ff;border-color:#e7ecf8}
.skill-card.muted .s-ic{background:linear-gradient(135deg,#9db4ff,var(--blue-l));box-shadow:0 8px 18px rgba(92,124,250,.22)}

/* ===== 联系我（经典深色大卡片，克制版）===== */
.contact-sec{padding-bottom:60px}
.contact-card{background:linear-gradient(135deg,#1b2a4a,#16213e 60%,#0f2e2a);
  border-radius:40px;padding:80px 72px;text-align:center;color:#fff;box-shadow:var(--shadow);
  max-width:1080px;margin:0 auto}
.sec-en.light{color:#9db4ff;font-size:15px;letter-spacing:3px}
.contact-title{font-size:clamp(32px,4.8vw,48px);font-weight:800;margin:16px 0 18px;line-height:1.25}
.contact-sub{color:#c5cee6;font-size:17px;max-width:680px;margin:0 auto 38px;line-height:1.9}
.contact-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.contact-btns .btn{padding:16px 38px;font-size:16px}
.contact-info{display:flex;justify-content:center;gap:52px;margin-top:38px;flex-wrap:wrap}
.contact-info p{display:flex;align-items:baseline;gap:12px;color:#9db4ff;font-size:15px}
.contact-info span{font-size:13px;opacity:.7;letter-spacing:1px}
.contact-info b{color:#fff;font-family:var(--font-en);font-size:18px;letter-spacing:1px;font-weight:600}
.back-top{display:inline-block;margin-top:22px;font-size:13px;color:#9db4ff;font-weight:600}
.back-top:hover{color:#fff}
.foot{text-align:center;padding:30px 20px;color:var(--ink-soft);font-size:13px}
@keyframes flip{0%{transform:rotateY(0) translateY(0);opacity:1}40%{transform:rotateY(90deg) translateY(-8px);opacity:.3}100%{transform:rotateY(0) translateY(0);opacity:1}}

/* ===== 作品详情弹窗（可下滑，便于后续加多图多文字）===== */
.modal{position:fixed;inset:0;background:rgba(18,28,56,.55);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;padding:24px;z-index:200;
  opacity:0;visibility:hidden;transition:opacity .25s}
.modal.show{opacity:1;visibility:visible}
.modal-card{position:relative;background:#fff;border-radius:28px;max-width:760px;width:100%;
  max-height:90vh;overflow:auto;box-shadow:0 30px 80px rgba(0,0,0,.32);
  transform:translateY(24px) scale(.98);transition:transform .25s}
.modal.show .modal-card{transform:none}
.modal-img{background:#eef2ff center/contain no-repeat;min-height:340px;position:relative}
.modal-close{position:absolute;top:14px;right:14px;width:42px;height:42px;border-radius:50%;border:none;
  background:rgba(255,255,255,.92);font-size:24px;line-height:1;cursor:pointer;z-index:5;box-shadow:0 6px 16px rgba(0,0,0,.2)}
.modal-close:hover{background:#fff;transform:rotate(90deg);transition:.25s}
.modal-body{padding:34px 34px 40px}
.modal-body .proj-no{display:block;font-size:38px}
.modal-body .proj-meta{display:block}
.modal-body h3{font-size:24px;font-weight:800;margin:6px 0 14px;line-height:1.35}
.modal-desc{color:var(--ink-soft);font-size:15px;line-height:1.85;margin:0 0 18px}
.modal-detail{display:flex;flex-direction:column;gap:14px;margin:0 0 20px}
.modal-detail p{color:var(--ink);font-size:14.5px;line-height:1.85}
.modal-gallery{display:flex;flex-direction:column;gap:18px;margin:6px 0 4px}
.mg-item{margin:0}
.mg-img{width:100%;height:auto;max-height:560px;display:block;border-radius:18px;background:#eef2ff;box-shadow:var(--shadow)}
.mg-item figcaption{margin-top:10px;font-size:13.5px;color:var(--ink-soft);text-align:center}
.modal-points{list-style:none;display:flex;flex-direction:column;gap:11px;margin:18px 0 20px}
.modal-points li{font-size:14.5px;color:var(--ink);padding-left:26px;position:relative;line-height:1.6}
.modal-points li::before{content:"✓";position:absolute;left:0;top:0;color:var(--mint);font-weight:800;font-size:16px}

/* ===== 响应式 ===== */
@media(max-width:860px){
  .nav-links{display:none}
  .hero-inner{grid-template-columns:1fr;text-align:center}
  .hero-left{order:2}
  .hero-right{order:1}
  .hero-chips,.hero-btns{justify-content:center}
  .hero-desc{margin:0 auto}
  .edu-cards{grid-template-columns:1fr}
  .edu-link{transform:rotate(90deg);padding:10px 0}
  .honor-bar{grid-template-columns:1fr}
  .proj-viewer{grid-template-columns:1fr}
  .proj-img{min-height:240px;height:240px}
  .modal-img{min-height:240px}
  .skill-row.lg{grid-template-columns:1fr 1fr}
  .skill-row.muted{grid-template-columns:1fr}
  .contact-card{padding:56px 28px}
  .contact-info{gap:28px}
}